Access blocked due to 'invalid' email address? Still getting all emails

Hello,
This has been happening off and on for a couple of months now. I go to TCF, and all but one subscribed threads are blocked, and I get an error message that my email address is invalid and my account suspended until I fix it. The only problem is that my email isn't invalid, it works perfectly fine, and I receive lots of TCF thread notification emails daily. So whatever system TCF is using to send out emails is triggering a false positive on invalid emails that are being sent, being received, and not bouncing back. So I change my email address to another email address (same mailbox, BTW), and then validate that email address via an email... and then things are reset to normal right away. Until a week goes by, I get the same message, and set my email back to the first one. Lather, rinse, repeat. I've been using the same email address on TCF for as long as I can remember. I'd like to get this fixed so I don't have to jump through these hoops every 4-5 days.
Thanks.
-Hank

 

It just happened again.. but the site won't let me reply to this thread or send a PM or do anything else until I updated and confirmed my email address, which I just did so I could post this. As before, I've been getting all emails and notifications to this email address.